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A magazine includes a report on the energy costs per year for​ 32-inch liquid crystal display​...

A magazine includes a report on the energy costs per year for​ 32-inch liquid crystal display​ (LCD) televisions. The article states that 14 randomly selected​ 32-inch LCD televisions have a sample standard deviation of ​$3.29. Assume the sample is taken from a normally distributed population. Construct 99​% confidence intervals for​ (a) the population variance sigmasquared and​ (b) the population standard deviation sigma. Interpret the results.

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